removing styles from content

I import a lot of products via xml but I have a problem with styles. I would like to remove all styles from content. Can this be done with custom code? This is my sample content.:

<p style="background: white; margin: 0cm;"><b><span style="color: black; text-transform: uppercase; font-family: 'Tahoma',sans-serif; font-size: 18pt;">CASTORLAND PUZZLE 1500el. Wolf's Night</span></b></p>
<p style="background: white; margin: 0cm 0cm 8pt; word-spacing: 0px; box-sizing: border-box; orphans: 2; widows: 2; font-variant-ligatures: normal; font-variant-caps: normal; -webkit-text-stroke-width: 0px; text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial;"><span style="box-sizing: border-box;"><span style="color: black; font-family: 'Tahoma',sans-serif; font-size: 14pt;">?</span></span></p>
<p style="background: white; margin: 0cm 0cm 8pt; word-spacing: 0px; box-sizing: border-box; orphans: 2; widows: 2; font-variant-ligatures: normal; font-variant-caps: normal; -webkit-text-stroke-width: 0px; text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial;"><span style="box-sizing: border-box;"><span style="color: black; font-family: 'Tahoma',sans-serif; font-size: 14pt;">Puzzle - 1500 elementowe o wymiarach obrazka 68 x 47 cm</span></span></p>
<p style="background: white; margin: 0cm 0cm 8pt; word-spacing: 0px; box-sizing: border-box; orphans: 2; widows: 2; font-variant-ligatures: normal; font-variant-caps: normal; -webkit-text-stroke-width: 0px; text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial;"><span style="box-sizing: border-box;"><span style="color: black; font-family: 'Tahoma',sans-serif; font-size: 14pt;">Uk?adanie puzzli rozwija cierpliwo??, ?wiczy pami?? i koncentracj?. Równocze?nie relaksuje, wycisza, a zarazem daj? du?o fajnej zabawy i satysfakcji z u?o?onego obrazka.<span style="box-sizing: border-box;">?</span>Po u?o?eniu mo?na je wykorzysta? jako oryginaln? ozdob? wisz?c? na ?cianie lub le??c? pod szyb? na stole.</span></span></p>
<p style="background: white; margin: 0cm 0cm 8pt; word-spacing: 0px; box-sizing: border-box; orphans: 2; widows: 2; font-variant-ligatures: normal; font-variant-caps: normal; -webkit-text-stroke-width: 0px; text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial;"><span style="box-sizing: border-box;"><span style="color: black; font-family: 'Tahoma',sans-serif; font-size: 14pt;">Szczególnie polecane jako wspólna rodzinna zabawa na d?ugie zimowe wieczory, a tak?e na ka?dy czas, kiedy chcemy poby? razem.</span></span></p>
<p style="background: white; margin: 0cm 0cm 8pt; word-spacing: 0px; box-sizing: border-box; orphans: 2; widows: 2; font-variant-ligatures: normal; font-variant-caps: normal; -webkit-text-stroke-width: 0px; text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial;"><span style="box-sizing: border-box;"><span style="color: black; font-family: 'Tahoma',sans-serif; font-size: 14pt;">?</span></span></p>
<p style="background: white; margin: 0cm 0cm 8pt; word-spacing: 0px; box-sizing: border-box; orphans: 2; widows: 2; font-variant-ligatures: normal; font-variant-caps: normal; -webkit-text-stroke-width: 0px; text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial;"><span style="color: black; font-family: 'Tahoma',sans-serif; font-size: 14pt;"><span style="box-sizing: border-box;">Wym. obrazka:</span><span style="box-sizing: border-box;">?68 x 47 cm</span></span></p>
<p style="background: white; margin: 0cm 0cm 8pt; word-spacing: 0px; box-sizing: border-box; orphans: 2; widows: 2; font-variant-ligatures: normal; font-variant-caps: normal; -webkit-text-stroke-width: 0px; text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial;"><span style="color: black; font-family: 'Tahoma',sans-serif; font-size: 14pt;"><span style="box-sizing: border-box;">Wym. opakowania:</span><span style="box-sizing: border-box;">?35 x 25 x 5 cm</span></span></p>
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